This environmental assessment was prepared as a negative declaration regarding the environmental impacts associated with the joint Gas Producing Enterprises (GPE) and the Energy Research and Development Administration (ERDA) project to stimulate six natural gas wells by massive hydraulic fracturing in the Uinta Basin of Utah. The results of this program could prove valuable in the exploitation of those potentially recoverable gas reserves in low permeability reservoirs as identified in the National Gas Survey by the Federal Power Commission. The purpose of this assessment is to present a brief description of activities proposed by GPE and to evaluate possible environmental disruption which might result from such a project. This assessment was prepared in accordance with the requirements of Title 10, Part II of the Code of Federal Regulations which outlines procedures to be followed by ERDA for the implementation of the National Environmental Policy Act of 1969 (NEPA).